Package org.apache.commons.math3.ml.neuralnet.twod.util

Class TopographicErrorHistogram

java.lang.Object
org.apache.commons.math3.ml.neuralnet.twod.util.TopographicErrorHistogram
All Implemented Interfaces:
MapDataVisualization
public class TopographicErrorHistogram extends Object implements MapDataVisualization
Computes the topographic error histogram. Each bin will contain the number of data for which the first and second best matching units are not adjacent in the map.
Since:
3.6

  • Constructor Details

    • TopographicErrorHistogram

      public TopographicErrorHistogram(boolean relativeCount, DistanceMeasure distance)
      Parameters:
      relativeCount - Whether to compute relative bin counts. If true, the data count in each bin will be divided by the total number of samples mapped to the neuron represented by that bin.
      distance - Distance.

  • Method Details

    • computeImage

      public double[][] computeImage(NeuronSquareMesh2D map, Iterable<double[]> data)
      Creates an image of the data metrics when represented by the map.
      Specified by:
      computeImage in interface MapDataVisualization
      Parameters:
      map - Map.
      data - Data.
      Returns:
      a 2D-array (in row major order) representing the metrics.